John Mayer Drinks Jen's Water

John Mayer chats with photographers after leaving his downtown apartment on the way to play a show on Long Island, New York on Wednesday.

John was carrying a bottle of Smartwater, the brand promoted by girlfriend Jennifer Aniston.

In unrelated news, John admitted to hooking up with a fan in the past! “Do you respect me for my honesty? The answer is yes I have,” Mayer said, before laughing and adding, “Not since the camera phone!”